Threading-machine.



3. H. mcmumm.

THREADING MAGE-UWE.

(Application filed Oct.. 7, 1899.)

f6 Sheets-Sheet l.

(No Windel.)

WiAtllcssus. 7/2, rnc/2@ f/2W,

Attorn eey.

' Patented Aug.. 28,1900. J. H. MACLAUCHLAN.

THREADING MACHINE..

(Application filed Oct. 1899.;

fr; Model.)

l l lllll Y Hulrl UIIIHJWIAIVM.

No. www,

`Pax-tamed Aug. 2a, 19m

J. H; MACLHLN.

THRIDING MMIRNE.

[Application filed Oct. 7, 1899.)

4 Sheets-Sheet 3 Inventor.

No. 656,3434 y Paterna@ Aug. 2s, mma.

I J. H. mAcLAucHLAN.

THREADI'NG MACHINE.

(Application led Oct, 7, 1899.) 4 (No Mmmm i 4 Sheets-Sheet 4,

Attnrnqy.

nieren STATES PATENT Orifice..

JAMES II. MACLAUCHLAN, OF WATERBURY, CONNECTICUT, ASSIGNOR 'TO THE WATERBURY MACHINE COMPANY, OF SAME PLACE.

THRsAoItIG-MACI-HrQE..

SPECIFICATION forming part of Letters Patent N o. 656,848, dated August 28, 1900.

` Application flied October 7, 1899. Serin! No. 732,853. (No model.)

To a/ZZ whom it may conce-rn.' y Be it known that I, Janus 1I. MAcLAUci-i- LAN, a eitizenof the United States, residing at .Waterbury, in the county of New Haven and State of Connecticut, have invented certain new and useful improvements in Threading* Machines, of which the following is a speciiication, reference being had therein'to the accompanying drawings.

My invention relates to improvements in threading-machines; and it is the object of my invention to make the thread byv means of threading-rolls `which rotate upon their own axes and at the same time travel con! tinuouslyin a circular path about acommon center. f

It is the further object of my invention to provide means' for conveying the blank rods to the threading-rolls and means for holding said rods against rotation while the thread is being cut thereon.

. The embodiment of my invention in machines for cutting screws with apointedend, as wood -scien/s, consists of two pairs, of threading-rolls, each pair being fastened upon the face of `a rotatable plate and one pair of which arepointing and the other "threading rolls. The face-plates rotate continuously in the same'direetion, .thereby obviatin g tle use V of reverse mechanisms commonly used in 'threading-machines. An intermittently-rotatable carrier conveys the rods to the rolls, and during the threading operation a gripping mechanism holds the rod against rot-ation. In euttin g threads 'upon rods having asquare end it is only necessaryto use a single pair of threadingfrolls, omitting thepointing-rolls.

'.lo these ends my invention consists .of the4 threading-machine having certain details of Vconstruction and combination'ol' parts, as i Willbe hereinafter described, and morepar-A ticularly pointe-tf. lout inV the claims.

Referring Ato thefdrawings, in which like numerals, designate like partsvof, the several views, Figure 1 is a fragmentary side elevaf` tion of a lthreadiiig-machine embodying my invention.h`ig.2 is a, plan view thereof.

Fig..3 is a transverse section upon theline A `B of liig. Fig." iis an elevation of the Fig. 5 is a fragmentary gripping ineehan ism.

"i U, an elevation carrier mechanism. Fig. 7 is a. detail view of one of the earrer'disks. Fig. t5 is a front view of therolls and the adjacent mechanism. Fig. i) is a fragmentary side View thereof. Fig. l0 is a front view of the threadingrolls. Fig. 11 is a front view of the point ingrolls, and Fig. 12 is a plan view thereof. ln the drawings the numeral 1 designates the bedplate, L the drip-pan, and 3 the legs.

inittent motion is imparted to said carriershai't 11 and the notched disk 15, fixed upon said shaft, from the shaft Ll.y 'l 1e disk 13 and arm 1i upon shaft 1i rotate continuously, the arm 1l carrying upon its outer end'a of the device for intermittently rotating the Y loosely-mounted roll 1G of the same diameter v as the width of the notches 17 in the phtte'l As the arm lit rotates the roll 1U isc y ried-into one of these notches and imparts a rotary motion to the disk 15, while the roll remains therein. The periphery of the plate 13 bears against the concaved recesses 1S in the periphery of the disk 15 soon after it begins to rotate, so that the friction between the two surfaces prevents thedisk 15i'rom being carried by momentum after the roll 16 has leftthe notch 17.

Upon the shaft il are two carrier-disks18, having a plurality of radial slots 19 around the outerv edge thereof, within which arcsecured spring-fingers 20, the lower ends of which are held rigid, while the upper-ends are free.- The rods 2l to be threaded areheldat either end in the slotsliiagainst the'bloeks 22 by the spring-lingers, as shown'in Fig. 7 A stop-plate il!) of thc'saine diameter as the carrier-disks is fastened upon" the rear earrier-disk as astopto insure aproper and unfiforln locationof the rod ends. These carrierdislts are adjustable along the said. shaft to accommodate anylength of rod desired. The

IOO

Athe threading-rolls.

rolls 8l 8l.a are mounted loosely uponfthe pointed ends of the adjustable screws 24, threaded in the roll-frames 25. A1ip26 upon; the frame 25 is fitted within a radial slotf27 in the plate 28, and said frames are adjusted radially upon said plate by rnea'ns of screwfs 29, provided with collars 30, which are einbedded in recesses in the face of the said plate. The frames are held rigid in theiradjusted positions by the screws 3l, which pass through thev elongated slots 33 into the face of the plate 28. By turning screws 29 the distance between the rolls can be varied and the frames may be held rigidly in any adjusted position. The rolls themselves are shifted lengthwise by the adj listing-screws 24 and jam-nuts 84'; The plates 28 are threaded on the ends ofthe shafts E with the hub brought up squarely against vthe collar 39, and to prevent wear and red-nee friction I prefer to insert fiber washers 40 back of said collar. The shafts are journaled in the movablev heads 36, and each shaft is provided with a driving-pulley 37. The pulley upon one shaft is between the journal-boxes 32, and upon the other shaft is near the end thereof, this construction being designed to simplify the counter-shaft mechanism overhead, and to` prevent endwise movement of the shaft having its driving-pulley near the end a collar 38 is fixed upon said shaft, as shown in Fig. 2. Throughout the length of each of the .shafts 35 is a-bore 4l, which bore also passes through the center of disk 2S, and attached te the rear ends of said shafts in the end of the bore is a pipe 42. Soda-water, oil, or other threadcutting liquid from any conveniently-located source of supply is conveyed 'through said pipe andthe center bores of the shafts 35 to I prefer to incase the withina` shell or hood, as 43, (s liown in Fig. 1,) to gatherthe liquid as it is thiown outward by centrifugal force. 4In' the bottom of shell 43 is a hole 44, through which lthe liquid is discharged therefrom,- after lwhich it drops through a hole in the bedplate l into the drip-pan 2, escaping thereplate' 28,'.aud the rolls j from through a pipe l5, whence it is conveyed and at the oi/ to the original source of supply. l

The heads 3G are movable lengthwise upon the top of the bed-plate"` l in the ways 57, which are covered by the caps 5S and are actuated by the cams i6, levers 47, and links 48. The levers-t7 are securedto the bed-plate by the studs 40, and attached to the free inner ends thereof' are thest uds 51,0"ai'ryingthe camrolls 50, which have a permanent contact with the cams 4U. The links 4S are pivotally secured at one end `to the levers et? by the studs er end to the 'heads 36 by `thestuds 53, hichstuds are adjustable lengthwise within a slot 5l by the screw 55, having collar 56 thereon for preventing end- ,wise movement thereof, while not preventing its rotation. Both of the cams 46 are of substan'tiali y the same shape, the only difference being the length of feed, which is greater in the cam for the threading-rolls than inthe cam ifor the pointing-rolls. As the cams rotate a longitudinal movement is imparted to the heads 36 from the'mechauism above described, the rolls 50 always being in contact with the cam-faces. The weights 59, which are conneeted with the heads byaflexible connection, draw the heads forward while the threads are being made, so that the rolls are held with a yielding pressure against the blank rod, while the cam mechanism before described posi'- I tively returns the heads to their original pesitions. 8c The gripping mechanism consists of an oscillatiug toggle-block upon the end of a. sleeve 61, which is mounted in astand 62, secured to the bed-plates by the bolts 63, acam 64, and erank-arxn-(i, fulcrumed midway of its length upon a stud G6 in the lower end ofa downwardly-projecting arm 67 upon the stand 62 and carrying at its lower end the cam-roll 68 and the yoke-shaped upper end having engagement with a stud 69, fixed in a crank-arm 70, which is rigidly secured to the sleeve 61. Supported within the sleeve 61 isp/.the inner, end of the shaft 1l, a collar 71 preventing endwise movement thereof. Two wing s 2 72 are upon the front end of the staud62.v and 95 mounted upon the top side ofthe said 'ivings are the gripper-slides 73 73, which slides are joined with the toggle-block G0 by adjustable connections consistingof the four threaded rods 74, turnbuekles 75, and jam-nuts' "76, two of said rods 74: being secured to the gripper-slides 73 and the others-to the toggle-block 60. Gripper-stands 79 are secured to the bedplate, and upon their upper surfaces are the gripperblocks 78,' which ane adjusted by means of the screws 7 9 and held rigid iii-any of their adjusted positions by the screws 80. I prefer to harden these books 78 and to in- .j sert hardened blocks 82 in the gripper-slides. Each of the rolls Sl Sl is provided with 'an angular groove having teeth cut thereon of the same pitch as the thread'to be formed upon the rod. The grooves in the pointingrolls 81, Fig. 11, have teeth only in the 'edges thereof, while in the threading-rolls 8l, Fig. l0, I' prefer to have 4the groove semicircular and ofthe same radius as the blank rod, the f threads being cut in the bottom of the groove v as well as the sides. For cleaianceand to permit the cuttings. or chips to free them- 12o seves every other tooth is cut away i f one side of the pointing-rolls. S1, and .a cutting edge is formed'on the said rolls by means of the groove S3, having au angular side. The grooves and surfaces of bo'th pairs of rolls can 125 be the same within my invention; but I prefer to form the threading-rolls as shown', for I find from practice .thatthis style of roll not only forms the thread, but burnishes it at the same time. l

The operation of my machine is as follows: The operator places in the carrier-disks the blank rods, with the rear ,lends against the IOC IOS

IIQ

slop-plate, which rods arefhcld by means of.

ning itself from the rolls.

essere the spring-fingers, as before described. The rods are first carried to the pointing-rolls by means of the intermittent motion given the said carriendisks and are there presented in front of theV center ot shaft 35 between the face of the gripper-slide 73 and the gripper block 78, as seen in Fig. L Toggiebloclr GO is now oscillated from the cam 64 ihrongh the mechanism before described, and the said gripper-slides shoot outward and hold the rods rigid against rotation until the thread ing operation is completed. The heads 36 are now advanced by means of the weight 59, the cams 40 being in such position as to per mit the weightto draw the heads forward, and as the rolls` come into contact with the end of the rod. they beginto rotate upon their own axis and by means of the teeth in the groove therein point the end of 'the rod and form a thread thereon. The adjustment of the pointing-head is such that the end of the blank is only permitted to iced to substantially the center of the relis, as seen in Fig. 12. W hen the rod has been pointed and threaded, the cams 4G draw the heads backn ward and the rolls S1 away from the rod. As the head is drawn backward the rolls rotate upon their own axis in the reverse direction from that in which they -were rotating dur-- ing the threadingV oneration, which motion is caused by the thread 'upon the rod unwind- Al'ter the head is withdrawn the gi'ipper-slides through their toggle connections are drawn inward and the rod is released. The carrier-disks are new rotated again and the blank is carried step by step to the threading-rolls Si, where the same operations are repeated With the gripper and the roll mechanisme, excepting that the feed of the head carrying the threading-rolls is longer than that of the pointing-heads, permitting the rods to pass between the rollfaces. After the rod has been threaded it is removed from the carrieirdisks and non' rod inserted.

There are many minor changes ,and'alteran tions that can be made Within my invention, and I would therefore haveit understood that I do 'not limit. myseil to the exact con-- struction herein shown and described, but claim all that falls fairly Within the spirit and scope oi my invention.

What I claim as new, and desire io secure by Letters Patent, ie

l. In a screw-cutting machine, pointing rolls, threading-rolls, each oi said relis be ing adjustably fixed to rotary shaft, which shafts are parallel with each other and, jenn naled in movabie beads; means for innpaiting` a reciprocating movementto said heads, the said means comprising rotary cams and. ler'er mechanism actualed by said cams and having' conectionwiih saidA heads; ca. meo`nanisl'n for presenting,r 'the rot'tbianlrs to the said rolls, and means for holding said blanks rigid during; the threading one ation, the said means comprising rigid gripperdilccke,

and toggle-actuated gripper-slides movable toward and away f rom the said gripper-blocks, substantially as described. y

2. In a gripping mechanism, the combination of the rigid gripper-block 7S; grippersiide 753 movable upon a rigid member; oscilliating toggle-block GO; adjustable connections the several rod-blanks will project outward 'from said disks a uniform distance; pointing and threading rolls rotatably mounted in rollframes fixed to rotary shafts and adjustable in a plane at right angles to the axis thereof; movable heads within which the said rotary shafts fare jonrnaled, means, as independently-actuated cam and iever mechanism, for imparting: a longitudinal movement to both of the said movable heads toward and away from the said carrier mechanism at oneand the same time; a gripper mechanism vfor hohling the rod-blanks rigid when the carrier mechanism is at rest and comprisinga camactnated toggle located midway between the lines ci' said rotary shafts; gripper-slides actnatedjby said. toggle and movable in a horirental piane toward and away from the lines of 'said shafts, and vrigid grimmnbloeks opposite the said grippeoslides, substantially as described.

` 4e. In a machine of the character described, havinr rotary threading-tools, the combination t@ re\` ilh of a carrier mechanism for presenting the rod-blanks tc said threadingtools. the said mechanism comprising carrier-disks fixed upon an intern'iittently-rotatable shaft, and having' radial slots in the periphery thereof, and means, as a spring- .fjnger fixed within cach of said radial slots, for retainin the saidrodbianks therein, subsianiiaiiy described.

in a machine of the character described, having; rotary threading-tools, the combina tion therewith. oi? a carrier mechanism for presenting the rod-blanks to the said threading-toois, the said mechanism comprising carrieidislrs .fined upon an intermittently-rotan table shaft, and 'hating .radial slots in the I periphery thereof, and means. as a springnger fixed within each of said ra-liai slots, for retaining the said rod-blanlrs therein, and means, a stop ixod to said carrier 1nechanism, for holding the said rod-blanks against endwiso nnwcznent within the said carrier diens, substantially as described.

o. in a machine oi' the cha racterdescribed, in ce .ibination with the inte'rmittentiy-rota- IOS IIO

table shaft 11; of the carrier-disks 18, secured thereto and having radial slots 19 therein; of spring-fingers 2O fixed at one end Within said slots and engaging with one of the sides of the said radial slots at the opposite end; and means, as the stop-plate 23, for preventing endwise movement of the rod-blan ks within the carrier-disks, all constructed and operating substantially as described.

7. In a machine of the character described, the combination with the rotary and longitudinally-movable shaft 35, ofthe ro1l-plate 28 secured thereon; roll-frames 25 25 adjustable radially upon the face of said roll-plate5 screws 30 30 threaded into said roll-frames and heid against endwise movement; a pair of rolls having toothed annular grooves therein; and screws 24 24 threaded into said roll- `frames and rotatably supporting thesaid rolls, all construeted'and operating substantially as described. l

In testimony whereof I affix my'signature 

